. >> i still like it here. i justwantustobe safer. >> reporter: you can't blame samuels for thinking her complex was, indeed, safer after a string of assaults earlier this summer, police arrested the man they say was responsible, antonio mouton. he now sits in jail, held there by $12 million bail. what's more, following the assaults, the complex's management increased the number of security guards working at the park regency. still, at around 6:00 last night, a 27-year-old woman called the sheriff's office to report she had been sexually assaulted. >> as she opened her door and entered her apartment, someone came in behind her and forced his way in. >> reporter: the contra costa sheriff's department believes this is not evidence that the park regency complex is unsafe. they do, after all, have security guards, a neighborhood watch, and security cameras. what this latest assault proves to them, though, is that no one, regardless of their circumstances should ever take their safety for granted. >> the bottom line is you can never lower your guard, and this type of incident can happen a